Device and method to detect an object in a given area, especially vehicles, for the purpose of traffic control
OwnerErnst Horberinventor
Life of this patent
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Abstract
When detecting an object in a given area, especially vehicles for the purposes of traffic control, there appear to be inaccuracies in the system based on measuring pulse propagation times. In order to avoid such inaccuracies, a sample of observed (measured) real values is compared with a gauging table having a sample of values stored therein, so that pulse propagation time measurements are no longer necessary.
Claims21
Apparatus for detecting an object in a predetermined spatial region, in particular vehicles for traffic monitoring, including
- at least one transmitter (10) for generating and emitting radiation pulses to the predetermined spatial region,
- at least one receiver (12) which receives the radiation backscattered or reflected from the predetermined spatial region and emits a detection signal (U(t)) as a function of backscattered or reflected radiation,
- at least two devices (15) for the detection of instantaneous values (Ui) of the detection signal U(t) within corresponding time intervals,
- a control device (14) which emits a control signal to the transmitter (10) to trigger the emission of a radiation pulse, and to the device (15) for the detection of instantaneous values for fixing the time intervals for detection of the instantaneous values, and
- a device (16, 17, 18) for comparison of a value pattern that can be derived from the detected instantaneous values, with stored value patterns.
Method for detecting an object in a predetermined spatial region, in particular vehicles for traffic monitoring, with the steps of:
- emitting at least one radiation pulse to the predetermined spatial region,
- receiving the radiation backscattered or reflected from the predetermined spatial region,
- generating a detection signal as a function of the radiation backscattered or reflected from the predetermined spatial region,
- detecting instantaneous values of the detection signal within at least two measurement time intervals,
- deriving a value pattern from the detected instantaneous values and
- comparison of the value pattern with stored value patterns.
Dependencies are inferred from the claim text.